Run: 2026-04-24-01KPZTVSMQ581TTF55E2PE6P9V

Run Details

Duration:
6.2s
Cost:
$0.011500
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
80.33% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The rain fell steadily against the gothic windows of Ravenshollow Manor, where thirteen guests had gathered for dinner that evening. Inside the grand dining hall, crystal chandeliers cast flickering shadows across faces that smiled without warmth or genuine feeling. Lord Ashworth raised his wineglass slowly, offering a toast to friendships old and secrets that would remain buried forever. The butler, Mr. Pemberton, noticed immediately that one chair sat empty, though all thirteen guests had arrived before sunset. A sudden crash echoed from the library upstairs, silencing conversation and freezing every hand that held silverware midway through motion. Lady Ashworth stood abruptly, her napkin falling like a white flag onto the polished mahogany floor beneath shaking feet. Nobody moved for several long seconds, until the grandfather clock struck nine times with ominous deliberation throughout the silent manor. Detective Marlowe, seated quietly near the window, rose calmly and gestured for the others to remain exactly where they sat. He walked upstairs alone, following the trail of fresh blood that painted the carpet in deep crimson, accusing strokes. Behind the oak door, Professor Whitmore lay motionless, clutching a torn photograph that would unravel every secret hidden within Ravenshollow.
created_at"2026-04-24T13:28:58.276Z" 4/24/2026, 1:28:58 PM
model"anthropic/claude-4.7-opus-20260416"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency934
moderation_latency(null)
generation_time6093
tokens_prompt46
tokens_completion328
native_tokens_prompt65
native_tokens_completion447
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
usage0.0115
router(null)
provider_responses
0
endpoint_id"0fa65117-00d9-4835-808d-9b68041d9ce4"
id"b3dadb18-4832-42b1-83ff-1f1ce27853af"
is_byokfalse
latency934
model_permaslug"anthropic/claude-4.7-opus-20260416"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777037338-mO8vOhwHOfE2kpgbpERx"
session_id(null)
api_type"completions"
id"gen-1777037338-xV97YgaXQCZaaB3MChN9"
upstream_id"b3dadb18-4832-42b1-83ff-1f1ce27853af"
total_cost0.0115
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
80.33% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
119
219
319
420
519
620
720
819
920